WHY don’t they wait?

Who are these people who block the door and push to get on a train or bus before people exit? Same with elevators.

Do these people not realize that they are slowing down the process by blocking the exiting passengers? And for the pushers, why? WHY WHY WHY? Don’t these pushers realize that the people exiting will actually create additional room in an already crowded space?

So they should move out of the way AND wait the TEN SECONDS to let people exit before they decide to push and shove their way on board.

Sincerely,
From someone who doesn’t push – but always seems to get pushed.